Crustal Mass Variation in Australia from Seismic Refraction Surveys

Geoscience Australia Data provides a dataset on crustal mass deficiency (CMD) across the Australian region, derived from seismic refraction surveys. The CMD values range from about 13 to 21 kt/m^2 on the continent and 15 to 17 kt/m^2 in nearby marine areas, indicating incomplete isostatic compensation at the crust's base. This dataset was last updated on 2026-05-14.

Use Cases

• Modeling regional isostatic compensation based on crustal mass deficiency (CMD) values.
• Analyzing the relationship between crustal density-depth structure and free-air gravity anomalies.
• Studying mantle density variations implied by crustal mass imbalances.
• Mapping geophysical provinces across Australia using crustal mass estimates.

Strengths

• CMD values are provided with a specific quantitative range (13-21 kt/m^2 on land, 15-17 kt/m^2 marine).
• Data is derived from seismic refraction surveys, a standard geophysical method.
• Includes corrections for average elevation and free-air gravity.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data files are in PDF and HTML formats, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Derived from seismic refraction surveys in Australia and nearby marine areas.

Freshness

Last updated 2026-05-14 09:43:53.579232; freshness should be verified.

Geography

Australian region and nearby marine areas